Faruk Razic

• University of Sarajevo

In the available literature, no research on target obliquity influence on terminal ballistics of PELE could be found. This study aimed to give an insight into this phenomenon. As a part of the research, numerical simulations were performed with four different target obliquity angles, namely 0°, 30°, 45°, and 60°. Before the simulations, the numeric...

Simulations were performed with long rod kinetic energy penetrators to characterize important parameters used. Hohler & Stilp's experimental results served as the initial validation for the numerical model. Additionally, using numerical simulations, the impact of various (possible) penetrator materials on their penetration depth is illustrated. Add...

Simulations were performed with long rod kinetic energy penetrators to characterize important parameters used. Hohler & Stilp's experimental results served as the initial validation for the numerical model. Additionally, using numerical simulations, the impact of various (possible) penetrator materials on their penetration depth is illustrated. Add...

The paper provides an overview of research (analytical, numerical, and experimental methods) related to the stress state of artillery projectiles during movement through the barrel of the weapon. The characteristics of the 155mm HERA M549 and 155mm HE M795 projectiles, used in numerical simulations, are described. As a main goal of the research, nu...

The paper provides an overview of research (analytical, numerical, and experimental methods) related to the stress state of artillery projectiles during movement through the barrel of the weapon. The characteristics of the 155mm HERA M549 and 155mm HE M795 projectiles, used in numerical simulations, are described. As a main goal of the research, nu...

This paper presented an experimental process of penetration testing of FDM 3D printed projectiles made of 5 different types of polymers. Phases of design and 3D printing procedure are described, along with details about materials. Experiment is conducted on an improvised setup with compressed air used for launching projectiles. Each material was te...

The paper shows a way how a 3D scanner can be used in a combination with numerical simulations and corresponding analytical results to estimate deformations and stresses in a loaded structural element, such as beams, pipes, shafts, etc. To compare measurement results, a series of numerical simulations were performed for a test object, which was a s...

A novel method for terrain mapping is presented in this paper. It is based on low-cost open source components, which brings this innovative technique to a much wider group of researchers than ever before. The in-house developed drone was used together with a commercially available LiDAR sensor to produce a terrain mapping platform. This system was...

Guns that operate on compressed air (Air Guns) are widely used in entertainment business. They are very common in Paintball and Airsoft competitive team sports and in performance riffles. Projectiles fired from these types of guns can reach more than 400 m/s. A Projectile weighing 5 g at this velocity has a kinetic energy of 400 J upon impact. This...

The paper shows a comparison of the three different methods to determine stress and strain in a U-shaped pipe compensator which is used to decrease stress in long pipes due to the constrained temperature dilatations. The stress and strain are analyzed analytically first with some parts of the analytical solution obtained numerically, such as integr...

Low-cost electrochemical sensors and in-house developed data acquisition system are used in two experiments, which reflect real-life scenarios of air pollution. Primary aim of this research is evaluation of the new approach for measuring the concentrations of toxic gases in realistic, everyday situations. These experiments include: continuous diurn...

Measurement of the concentrations of toxic gases (such as CO, SO2, NOX and O3) in the air represent important but challenging task. Traditionally, these concentrations are measured by means of heavy and expensive toxic gas monitors, usually operated by the governmental institutions. In this paper we present a novel method based on commodity (lowcos...

Graphical presentation of the measured data is more popular than ever before. However, rich and colourful images are often misrepresentation of the measured quantities. In this paper we discuss proper mathematical technique for correct presentation of data from the network of sensors. Three common methods for spatial interpolation are demonstrated...

PIT tests are usually performed when a mass distribution of High Explosive (H.E) projectile fragments is required. This paper shows the underwater detonation effects of 60 mm, M90 H.E. mortar bomb filled with Comp. B on cylindrical concrete structure (concrete pipe closed at one end - similar to a PIT test) which is 2 m high (inner height) with inn...

Low intensity warfare had many impact on reducing logistic costs during field operations. It influenced the development of new large caliber HE projectiles. Concerning increasing lethal efficiency at target, the focus is at development of modern projectiles with natural, embossed and preformed fragmentation. Modern natural fragmentation projectiles...